Can Fiddler Crab live with Sailfin Molly?
Caution — with care
Why
- Fiddler Crab can grab Sailfin Molly while it sleeps — only fast mid/top-water fish are reasonably safe.
Sweet spot: both do well at 72–82°F and pH 7.5–8.5 — aim there.
Side-by-side
| Fiddler Crab | Sailfin Molly | |
|---|---|---|
| Temperature | 72–82°F | 68–82°F |
| pH | 7.5–8.5 | 7.5–8.5 |
| Hardness (GH) | 15–25 dGH | 12–30 dGH |
| Adult size | 2" | 5" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 30 gal |
Together, plan on at least 30 gallons.
How to make it work
- Only combine with fast, mid/top-water fish and give the tankmates plenty of escape routes.
Design the whole tank, not just the stocking
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Design a tank with Fiddler Crab, Sailfin Molly →Everything compatible with Fiddler Crab · …with Sailfin Molly